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A symbol-based game-annotation system developed in 1983, relying on an easy-to-read sequence of colours and geometric shapes to document the game moves. Most MC players will probably remember it as being the driving force of Treadgold's 1985 campaign to introduce Mornington Crescent to schools. However, despite being an IMCS standard since 1994 (alongside Venbacker Notation), DeHaile notation is rarely seen outside of under-15s matches.